Shuttle for carpet looms



April 13, 194s.

l. B, BAsslNDALE SHUTTLE FOR- CARPET LOOMS Filed Feb. 21', 1947 mw www mhmwwm wwmwm Q Y w M W m Patented Apr. 13, 194s 2,439,594 SHUTTLE FOR CARPETLOOMS Isaac B. BssindalafGrasscroft, England Application February 21, m47, serial No.y 730,044 In Great Britain February 16, 1946 Section 1, Public Law 690, August,8,`194r6 a claims. y(ci. 139-1124) This invention relates to shuttles for forming f the selvedge in a carpet being woven in a carpet loom employingone or more selvedge shuttles.

As at present generally constructed a shuttle for this purpose is relatively small and only capable of holding a small yarn package. Consequently the yarn.y hereinafter for convenience rep Referring to the drawings, the shuttle com-` prises a body I of larcuate shape in plan, formed vat its front end with a tapered and slightly turned-up nose II, and being rounded at its rear end I2. The shuttle body III presents in lts outer curved side anopen-sided compartment I3, the

base of the body forming the floor I4 of the comferred to as the selvedge c ord, is quickly exhausted, thus necessitating frequent stopping of the loom to enable replenishment ofthe cop and.

piecing up of the selvedge cords to be effected.

The frequent stoppages adversely affect the productive capacity of the loom. Further, in shuttles as at present constructed the selvedge cord is wound on a small metal spool which re- `volves in one fixed and one spring-loaded pivot bearing in the shuttle. The spring on the pivot bearing acts on the spool of selvedge cord as a brake and is adjustable to regulate the tension on the cord which is drawn from the outer side of the spool. It is obvious that when the spring lis adjusted for a full spool the tension must vary as the spool diminishes in diameter due to the pull of the cord being exerted at a less radius. The variation in tension on the cord tends to produce an irregular edge"on the carpet`being woven..V v l 'I'he present invention overcomes these disadvantages by providing a selvedge shuttle whichis capable of receiving a much larger yarn package than has heretofore beenvpossible, e. g., a solid wound cop, that is a cop consisting entirely of yarn tightly wound without the use of a pirn or tube, in which the selvedge cord, being drawn from the centre of the cop, can be drawn off until the cop is exhausted without any variation in the tension which remains constant throughout the operation.

A selvedge shuttle according to the invention, having a curved body of large size to receive a solid wound cop, embodies an adjustable cord tension element, a spring-influenced element for -partment I3, presenting a plane :dat surface upon Whichfthe shuttle slides in the shuttle race, while the top of the shuttle body,r forming the roof I5 of said compartment, isparallel with the bottom or base from the rear of the shuttle to a point approximately two-thirds of the length of the shuttle when it is inclined downwardly towards the base I4, whereby to` produce the aforesaid tapered nose II. The tip of said nose is curved slightly upwards, see Figs. 1 and 4, for a purpose later to be explained. A recess is formed in the top -of the shuttle for engagement of the front shuttle driver, Atherecess being indicated atv I6 in` Fig. 4 and in dotted lines in Fig. 1. f

` That portion I3n of the compartment I3 for` receivingthe cop, indicated at C, is deeper than the remaining portion, therdeeper portion I3a extending fromthe rounded rear end I2 of the shuttle body I0 to a point just short of the mid- I I horizontal centre line of the arcuate shuttle body,

putting a drag on the cord being drawn olf from i the cop whereby to prevent the formation of snarls. and means for preventing the formation of an undesirably large loop of surplus cord outside the shuttle.

Description will now be given of a practical construction of shuttle according to the invention, reference being made to the accompanying drawings in whichv Fig. l istl side view of a shuttle: Fig. 2 is a plan of the shuttle shown in Fig. 1, part of the upper wall being broken away to expose the interior; Fig. 3 is a sectional view through the line III-III ofA Fig. l; Fig. 4 isa perspective view. drawn to a smaller scale, ofthe shuttle with the cover plate in position.

The same reference characters indicate corresponding parts in the several' ilgures of the drawings. e

as viewed planwise, and is adapted to receivev a large solid wound cop C of selvedge cord, the walls I4 and I5 and, if desired, the side wall I1 of the deep compartment I3* being grooved or serrated as at I8 to facilitate retention of the cop C in the shuttle. 4For convenience, this portion of the compartment will hereinafter be referred to as the cop compartment.

including a thin metal plate I9 bent angularly upwards at one end to. provide a vertical flange 70, which extends coplanar with the edge I3b of the side wall of the compartment I3. said wall and the flange 20 providing an end wall for thev con compartment |39'. At its opposite edge the metal plate I9 is formed with an upturned portion 2| to provide a guide for the selvedge cord in its passage beneath the tension member, and to prevent the selvedge cord working out from under the pressure plate of the tension member. A relatively thick metal, plate 22, hereinafter referred to as the base plate, is fitted on top of the thin plate I9 and the two plates are secured in the shuttle by any appropriate means', e. g., by

riveting. as indicated at 23, Fig. 1.

The base plate 22 is. formed with a vertical bush 24 upon which is loosely mounted a metal pressure plate 25, preferably boat-shaped or elliptical, as shown in Fig. 2. and restrained against turning movement relatively to the bush by a peg 26, Fig. 3, projecting from the base plate 22 and engaging the pressure plate 25. The peg 26 is formed at its upper end with a conical point adapted to engage in a conical-ended recess in the pressure plate 25 whereby to provide a hinge for the pressure plate 25 when said pressure plate is lifted to permit passage of the selvedge `cord thereunder. The pressure plate 25, is held in yielding contact with the base plate 22 by a compression spring 26 encircling -a stud bolt 21 projecting through .the bush 24 and formed at its upper projecting end with ahead 28 affording abutment for the spring 26 and being screwthreaded at its lower end where it is furnished with a screw-threaded locking nutl23, whereby the compression of the spring 2I may be regulated, The lower end of the stud bolt 21 is screwed into the thick side wall of the shuttle I Il in which a recess 30 is formed to accommodate the locking nut 29. The base plate 22 is also furnished with a guide hook 3| and a guide eye 32.

Located in the tension compartment I3, inV

proximity to the tension device, is a serrated roller 33 journalled in the bifurcated ends of a spring plate 34 xed by screws to th'e side wall of the tension compartment. The spring plate 34 is formed with'an upstanding tongue 35 having a groove therein to serve as a guide to ensure that the selvedge cord C' passes directly below the centre of the serrated miler 33.

A passage 36 is formed in the side wall of the tension compartment I3 to provide communication with the cop compartment I3* and -a guide eye 31 is provided in th'e tension compartment adjacent to the opening of the aforesaid passage 36 into the tension compartment I3.

A tension spring 38 is secured at one end to a screw 39 adjacent to the end of the tension compartment remote from the tension device, the opposite end of the spring 33 being .provided with an eye 40.

In the upper wall or roof I of the tension compartment I3 there is formed an eye4l for passage of the selvedge cord. Y

In the preparation of a shuttle for use, the free end of a solid wound cop of selvedge cord is threaded through the passage 36 in the wall of the tension compartment I3 prior to the cop C being pressed into the cop compartment I3, The loose end of the selvedge'cord is then threaded through' the'guide eye 31 adjacent to the end of the passage 36, then led through the slotted guide 35 and beneath the serrated roller 33, under the spring-inuenced pressure plate 25 of the tension device, through the adjacent guide h'ook 3| and guide eye 32, then through the eye 40 l of the tension spring 38 and finally through the eye 4I in the wall of the shuttle. The .pressure of the spring 2lia of the tension device is regulated to apply the desired degree of tension to the selvedge cord, 1

In the operation oi the shuttle, the selvedge cord is drawn olf from the centre of the cop and the slight dra-g imparted to the selvedge cord by the spring-infinenced serrated roller 33 prevents the formation of. or straightens out, any snarls in the selvedge cord.

The tension of thelcoiled spring 33 serves to draw any surplus selvedge cord into the tension compartment I3, thereby avoiding the formation of an undesirably large loop of selvedge cord outside the shuttle which might become trapped between the'shuttle and the shuttle race.

The opening in the compartments I3, I3` is closed by a spring plate or cover 42 (Fig. 4) having a curl at one end and adapted to engage a hinge pin 43 mounted in the top and bottom walls of the shuttle adjacent to the rear end I2 of t e cop compartment I3, while the opposite end f the plate or cover 42 is sprung below a retal ing pin 44 located adjacent to the front end the tension compartment I3- K The tapered and slightly turned-up formatio of the nose II of the shuttle facilitates entry of the shuttle through the loop of weft carried by the needle which is formed in its lower surface A with a groove or recess at the place where the shuttle enters theloop ofweft, while the curved formation of the shuttle facilitates passage of the loop of weft along the body of the shuttle until it drops oif the blunt end I2 and is subsequently caught by the selvedge cord.

As the amount of selvedge cord contained in a shuttle 'as described is many'times the amount of selvedge cord contained in even the largest size of shuttle as at present constructed it follows that the stoppages of a loom for replenishment of the selvedge cord are much less frequent than heretofore necessary and consequently the productive capacity-of the loom is increased.

A shuttle constructed as described is advantageous for 'use with a shuttle motion as described in the specification of my copending application for Letters Patent Serial No. 730,043,

of the loom.

led February 21, 1947.

What is claimed is:

1. A selvedge shuttle for a carpet loom, having an arcuate body formed with an open sided cavity to receive af cop, and embodying anadjustable cord tensioning element, a` spring-inuenced element for putting a drag on the cord being drawn-off from the cop whereby to prevent the formation of snarls. and means for preventing the formation of an undesirably large loop of surplus cord outside the shuttle.

2. A selvedge shuttle as claimed in claim 1 having an arcuate body having a compartment to receive a cop, and an adjoining compartment, a tension element in said adjoining compartment comprising a thin metal plate flanged to provide guide means, a relatively thick metal base plate superposed on said rst-mentioned plate and formed with a projecting bush, a metal pressure plate strung on said bush, spring means for holding said pressure plate in yielding contact with said base plate, an anti-snarling element comprising a serrated roller and la spring plate providing a journal for said roller and having guide means to direct the selvedge cord under the centre of said roller, and a tension spring anchored at one end of said second compartment and having at its free end a guide eye to receive the selvedge cord in its passage to the deliveryA eye of the shuttle.

3. A selvedge shuttlel as claimed in claim l, having acompartmented body of arcuate shape in plan, formed at its front end with a tapered nose upwardly-curved at its tip, said body being ro'unded at its rear end, and having a recess in its top for engagement by the front shuttle driver I. B. BASSINDALE. 

